Car-heating system.



W.v C. SQUIRE.

GAR HEATING SYSTEM.

APPLIGATION FILED MAY 11,

Patented Feb. 16, 1915.

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` '@TAE@ AEN hlhll@t f WILLIS C.` SQUIRE, F CHICAGO, ILLINOIS.

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amants.

'j To all whom it may] concern.'

lating device 1, having Be it known that I, WILLIS C. SQUIRE, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Car-Heating Systems, of which the following is a specification.

I This inventionrelates to steam heating systems, and more particularly to an apparatus adapted for heating carsin railway Une object of my invention is to provide an improved steam heating apparatus of the above mentioned character which is economical in the use of steam and which readily responds to slight variations in temperature, thereby maintaining a substantially constant temperature in the heating system.

Another object is to provide an improved thermostatic regulating devicey of simple construction and inexpensive to manufacture.

In the accompanying drawing; Figure 1 is an elevation of a steam heating system for a car, partly in section, and with portions of the devicebroken away, with a preferredl form of my improvements embodied therein, and F ig. 2 a sectional elevation of the thermostatic steam regulating mechanism.

The type of heating apparatus for which my improvements are more particularly designed is similar to that shown and described in Patent No. 777203, granted on December 13, 190-1, to Antoine Heintz, and broadly stated comprises a thermostatic regulating device, governed by the temperature of the return steam or vapor of the heating system at the outlet thereof for controlling the admission of live steam to the heat radiating pipes and an ejector or other means operated by the fiow of live steam for drawing the return steam or vapor into the steam supply pipe and thereby inducing a circulation of same through the system. Accordingly, the car equipment may comprise, as shown in the drawing, a thermostatic regua live steam supply pipe 2 connected thereto and provided with ejectors 6 which are connected through pipes l with heat radiating pipes 3, the return pipes 5 for the system being also connected to said thermostatic regulating device 1 and having an atmospheric outlet pipe or passage 20.

As shown in Fig. 2, the thermostatic regu- Specication of Letters Eatent.

Application filed May 11, 1908. Serial No. 432,216.

lating device comprises a casing 7 having a chamber 25 containing a thermostat 8 of any desired construction, operatively connected to a live steam admission valve 9, the casing 7 being constructed in one piece to simplify and reduce the cost of manufacture. In order to assemble the thermostat within the casing, a removable screw threaded cap 10 is provided, the removal of which permits the insertion of the thermostat. The valve 9 controls communication from the steam inlet pipe 2 to the annular space 26 surrounding the ejector tube 6, which communicates through a choke tube 12 with the supply pipe 4f and the heat radiating pipes 3. Thevalve 9 is preferably mounted inv a special one piece iitting 11 containing the ejectors 6 and having a connection to the live steam pipe 2. Said fitting is also provided with a pipe section 19 communicating with the interior of the ejector suction tubes 6 and connected to the casing 7 so as to communicate with a passage 15 therein which leads to the return pipes 5, The pipe section 19 and the portion of the fitting containing the valve are each provided with tapered seats 13 adapted to make tight joints in the main casing 7 by screwing home a single union nut 14. The return steam passage 15 extends into the casing 7 and is separated from the chamber 25 by a wall 16 having a suitable aperture 17 therein to permit the exhaust steam or vapor to flow to and around the thermostat 8. A dellector wall 18 is also provided to facilitate the diversion of the major portion of return steam directly to the pipe section 19 and the ej ectors.

In operation, the thermostat is adjusted to open the steam valve 9 at the desired critical temperature, so that when the temperature of the return steam or vapor falls slightly below this temperature the thermostat actuates the valve 9 and admits live steam to the system. The flow of the live steam through the ejector induces a liow of return steam or vapor from the return pipe 5 to the annular space 26, through the well known action of the ej ectors 6. The thermostat chamber being of small capacity, and the flow of return steam thereto being considerably restricted, the thermostat is rendered much more sensitive to slight changes in temperature of the return steam. Wasteful condensation in the casing is also avoided and by diverting the flow of return steam to a large extent to the ejectors, a larger proportion of the same is utilized for heating purposes.

Where steam is first admitted to a car, the heating pipes are cold and it is therefore highly desirable to provide a more rapid initial circulation of steam in the heating pipes. For this purpose, another feature of my improvements consists in providing a port 2l, opening into the steam supply pipe 2, and adapted to be controlled by the movement of the valve 9, so that when the valve is in its wide openposition the port 21 is thereby uncovered and a flow of steam therefrom to the heating pipes is obtained, in addition to the flow through the direct port controlled by the valvey 9. With the r'ise 'of temperature' in the thermostat casing, due to the return fiow of steam,lthe thermostat gradually moves the valve 9 toward its seat, and vduring the movement the additional supply passage is cut off, so that in the operation of the apparatus thereafter the port 2l remainsclosed.

In order to secure a more uniform distribution of the heating medium from the supply pipe to the heat radiating pipes I provide means consisting of walls 22 in the manifold fitting 23, for deflecting the iow of steam. Said walls being so located that a substantially uniform flow of steam is diverted from the supply pipe to each heat radiatingv pipe.

I have illustrated a construction in the Copies of this patent may be obtained for drawing in which two ejectors are employed for supplying steam to two sets of heat radiating pipes, as by so arranging the apparatus, a more efficient operation is secured, but if desired a single ejector may be used.

It will now be apparent that I have provided a construction of few parts, readily assembled, and by means of which a substantially constant degree of temperature may be maintained in the system and wherein a high ratio of sensible heat in proportion to the live steam used is attained.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is

In a steam heat regulating device, a casing provided with an outlet passage, a thermostat mounted in said casing, a one piece pipe fitting having two joint sections, a valve mounted in one joint section and adapted to be operated by said thermostat, the other joint section being adapted to make connection with the casing to establish communication with said outlet passage, and a single union nut adapted to clamp both joint sections into engagement with the casing.

In testimony whereof, I have hereunto set my hand.

WILLIS C. SQUIRE. Witnesses:

C'. W. ALLEN, J. W. LUTTRELL.

ve cents'each, by addressing the Commissioner of Patents Washington, D. C. 

